diff --git a/reactos/base/applications/games/spider/spider.cpp b/reactos/base/applications/games/spider/spider.cpp
index b89d3290b16..96188e0c518 100644
--- a/reactos/base/applications/games/spider/spider.cpp
+++ b/reactos/base/applications/games/spider/spider.cpp
@@ -50,7 +50,7 @@ void MakePath(TCHAR *szDest, UINT nDestLen, const TCHAR *szExt)
     lstrcpy(ptr + 1, szExt);
 }
 
-BOOL CALLBACK DifficultyDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
+INT_PTR CALLBACK DifficultyDlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     switch (uMsg)
     {
@@ -239,7 +239,7 @@ CardImageWndProc(HWND hwnd,
 }
 
 
-BOOL CALLBACK CardBackDlgProc(HWND hDlg,
+INT_PTR CALLBACK CardBackDlgProc(HWND hDlg,
                               UINT uMsg,
                               WPARAM wParam,
                               LPARAM lParam)